A capacitor is connected to a DC power supply providing a potential difference ?
ID: 1324375 • Letter: A
Question
A capacitor is connected to a DC power supply providing a potential difference ?V across the plates of the capacitor. Assuming that it is safe to double the voltage across the capacitor (so that no dielectric breakdown occurs), what will happen to the capacitance and the energy stored in the capacitor, when the voltage is doubled?
The capacitance does not change, the energy is quadrupled.
The capacitance is doubled, the energy is doubled.
Both capacitance and energy do not change.
The capacitance is doubled, the energy is cut in half.
The capacitance does not change, the energy is quadrupled.
The capacitance is doubled, the energy is doubled.
Both capacitance and energy do not change.
The capacitance is doubled, the energy is cut in half.
Explanation / Answer
1. capacitance will not change
(only charge will be get doubled)
2.E=0.5CV^2
E will get 4 times
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